Final answer:
Legitimate reasons for voiding a cash register charge include customer returns and price discrepancies.
Step-by-step explanation:
A legitimate reason for a void of a cash register charge, other than cashier error, could be a customer returning an item for a refund or exchange. For example, if a customer purchased a product but later realized that it was faulty or not as described, they may request a refund or exchange. In such cases, the cashier would void the original charge and process a new transaction to reflect the return or exchange. Another legitimate reason for a void could be a price discrepancy between the advertised price and the actual price at the point of sale. If the customer notices the discrepancy and brings it to the cashier's attention before payment, the cashier can void the charge and correct the price.